Facts on Design Pattern➡Christopher Alexander was the first person who invented all the above Design Patterns in 1977. ➡But later the Gang of Four - Design patterns, elements of reusable object-oriented software book was written by a group of four persons named Erich Gamma, Richard Helm, Ralph Johnson and John Vlissides in 1995. ➡That's why all the above 23 Design Patterns are known as Gang of Four (GoF) Design Patterns.

Question

Facts on Design Pattern➡Christopher Alexander was the first person who invented all the above Design Patterns in 1977. ➡But later the Gang of Four - Design patterns, elements of reusable object-oriented software book was written by a group of four persons named Erich Gamma, Richard Helm, Ralph Johnson and John Vlissides in 1995. ➡That's why all the above 23 Design Patterns are known as Gang of Four (GoF) Design Patterns.

Hridendra Srivastava · Accepted Answer

Facts on Design Pattern➡Christopher Alexander was the first person who invented all the above Design Patterns in 1977. ➡But later the Gang of Four - Design patterns, elements of reusable object-oriented software book was written by a group of four persons named Erich Gamma, Richard Helm, Ralph Johnson and John Vlissides in 1995. ➡That's why all the above 23 Design Patterns are known as Gang of Four (GoF) Design Patterns.

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